DWN_MIRRORIMAGE, DWN_DOWNLOADONLY gives quick visual feedback with IImgCtx_Load - so they sure work.
IMGANIM_ANIMATED seems to be returned from IImgCtx_GetStateInfo for animated GIF's - but not for 'static' images. Just not sure what to do with it.
More info about the callback function would also be nice (what the heck is the first argument?)...
Pelle